function round(value){
	var result = Math.round(value*100)/100;  //returns 28.45
	return result;
}

function showChart(imgObj, symbol){
	var yahooUrl = "http://ichart.finance.yahoo.com/z?s=" +symbol+ "&t=1y&q=l&l=on&z=l&p=s&a=v&p=s&lang=en-US&region=US";
	imgObj.style.display="block";
	imgObj.src = yahooUrl;
}

function showGoogleChart(imgObj, imgUrl){
	imgObj.style.display="block";
	imgObj.src = imgUrl;
}

function base64ArrayBuffer(arrayBuffer) {
	  var base64    = ''
	  var encodings = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/'

	  var bytes         = new Uint8Array(arrayBuffer)
	  var byteLength    = bytes.byteLength
	  var byteRemainder = byteLength % 3
	  var mainLength    = byteLength - byteRemainder

	  var a, b, c, d
	  var chunk

	  // Main loop deals with bytes in chunks of 3
	  for (var i = 0; i < mainLength; i = i + 3) {
		// Combine the three bytes into a single integer
		chunk = (bytes[i] << 16) | (bytes[i + 1] << 8) | bytes[i + 2]

		// Use bitmasks to extract 6-bit segments from the triplet
		a = (chunk & 16515072) >> 18 // 16515072 = (2^6 - 1) << 18
		b = (chunk & 258048)   >> 12 // 258048   = (2^6 - 1) << 12
		c = (chunk & 4032)     >>  6 // 4032     = (2^6 - 1) << 6
		d = chunk & 63               // 63       = 2^6 - 1

		// Convert the raw binary segments to the appropriate ASCII encoding
		base64 += encodings[a] + encodings[b] + encodings[c] + encodings[d]
	  }

	  // Deal with the remaining bytes and padding
	  if (byteRemainder == 1) {
		chunk = bytes[mainLength]

		a = (chunk & 252) >> 2 // 252 = (2^6 - 1) << 2

		// Set the 4 least significant bits to zero
		b = (chunk & 3)   << 4 // 3   = 2^2 - 1

		base64 += encodings[a] + encodings[b] + '=='
	  } else if (byteRemainder == 2) {
		chunk = (bytes[mainLength] << 8) | bytes[mainLength + 1]

		a = (chunk & 64512) >> 10 // 64512 = (2^6 - 1) << 10
		b = (chunk & 1008)  >>  4 // 1008  = (2^6 - 1) << 4

		// Set the 2 least significant bits to zero
		c = (chunk & 15)    <<  2 // 15    = 2^4 - 1

		base64 += encodings[a] + encodings[b] + encodings[c] + '='
	  }

	  return base64
}

function setChart(b64Data, imgElementId){
  	//var img_src = '';
  	var img_src = 'data:image/png;base64,' +b64Data;
  	var img = document.getElementById( imgElementId );
  	img.src = img_src;
}
  